128099064 has 128 divisors (see below), whose sum is σ = 354816000. Its totient is φ = 38392704.

The previous prime is 128099057. The next prime is 128099113. The reversal of 128099064 is 460990821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 921507 + ... + 921645.

It is an arithmetic number, because the mean of its divisors is an integer number (2772000).

Almost surely, 2^128099064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128099064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177408000).

128099064 is an abundant number, since it is smaller than the sum of its proper divisors (226716936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128099064 is a wasteful number, since it uses less digits than its factorization.

128099064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 128099064 is about 11318.0857038635. The cubic root of 128099064 is about 504.0983997846.

The spelling of 128099064 in words is "one hundred twenty-eight million, ninety-nine thousand, sixty-four".